Improvement in windmills



TgN. SHBPHABD.

Windmill. i

No. 199,473. Patented Jan. 2`2, 1187s.

UNITED STATES PATENTOFFIcn THOMASN. SHEPHARD, OF LINCOLN, NEBRASKA,ASSIGNOR OF ONE-HALF HIS RIGHT TO WARREN FULLER, OF SAME PLAGE.

IMPROVEMENT IN WINDMILLS.

Specification forming part of Letters Patent No. 199,473, dated January22, 1878 application led December 1, 1877.

`To. all 'whom itmcy concern:

Be it known that I, THOMAS N. SHEPHARD, A

of Lincoln, in the county of Lancaster and State of Nebraska, haveinvented certain new anduseful Improvements in Windmills;

is made, and which fully illustrate my invention, Figure l is a sideelevation of my windmill, partly in section. Figs. 2, 3, and 4 aredetail views' of parts thereof.

A represents the tower of the mill, of any suitable construction, withbed-plate B on top. O represents the turn-table, made in circular form,with a tube, a, extending downward from the same through the bed-plate,and through Y a guide, b, at a suitable point in the tower.

In bearings formed in the turn-table C is placed the horizontal shaft d,to the vend of which the wind-wheel is secured. Upon this shaft, withinthe turn-table, is a gear-wheel, e,

which meshes witlu a similar wheel, el, underneath for rotating theshaft 7,f'passing down t through the tube c.` The wheel e alsomesheswith a similar wheelaez,` on top, for operating the governor-arms E Eabove.

The wind-wheel is composed of a central hub, D, provided with a seriesof radial arms,

DI, connected at their outer ends by a rim D2.

G Gr represent the fans of the wheel, pivoted on the arms D1, andconnected by links 'i and arms h to a spider or wheel, H, placed looselyon the shaft d between the wind-wheel and the turn-table.

The hub of the spider or wheel H is formed with a circumferentialgroove, in which ts the forked arm of a lever, I. This lever is pivotedbetween two short arms projecting from the turn-table, and its upper endis slotted, and passes over one arm of an elbow-lever, J, which is alsoslotted, as shown.

. A pin, is passed through and fastened in the slotted end of the leverI, said pin pass ing through the slot in the lever J ,whereby allliability of said levers disengaging with each other 'is entirelyobviated, while at the same time they can easily move as required. p

In a full-sized windmill the pin a: will be provided with a roller toreduce the friction.

The lever J is pivoted at its elbow in a slot in the turn-table, and itsinner end is connected to the shaft or' rod la, that connects with thegovernor-arms E.

The fans G of the wind-wheel are so hung upon their arms Dl that aboutone-fourth of each fan is in front of the arm, and threefourths in rear.The fans being thus hung form the vane of the mill, and also a secondgovernor. The wind blowing on the fans hung in this manner turns theedge to the wind, and also raises the governor-balls E in time of severestorm, and the revolving of the governor-balls acts upon the fans, whichgives the mill a uniform speed.

The balls E are to be made adjustable by set-screws on the arms, whichwill make the mill throw out easy or hard, according to the requiredpower wanted.

The lower end of the shaft f is to be geared to a horizontal shaft, fromwhich latter the machinery to be operated will receive its motion.

Having thus fully described my invention, what I claim as new, anddesireto secure by Letters Patent, is-

1. The turn-table O, inclosing the gearwheels e el, in combination withthe tube a,

shaft f, and governor, substantially as and for the purpose set forth.

2. The combination of the wind-wheel fans G, links i, arms h spider H,lever I, with slot and pin w, the slotted elbow-lever J, and thegovernor-rod k, substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing asmy own I have hereto affixedmy signature' in presence of two witnesses.

. THOMAS N. SHEPHARD.

Witnesses BENJA. F. FIsHER, J. H. HARRIsoN.

